Americas consulting services market is the largest in the world. It currently has about 62% share of the global environmental consulting services market. The market in Americas grew at a CAGR of 1.8% in the historic period and is expected to grow at a CAGR of 2.0% in the forecast period.

The Publicly Owned Treatment Works POTWs and other point source discharges have improved the treatment and disposal of effluent water significantly in the USA. As of January 1, 2012, 14,478 POTWs were serving 238.2 million people throughout the USA. The US government invested more than $2.2 trillion in the last 60 years on their maintenance and operations. One of the major issues concerning waste water management is the constant need to update the wastewater treatment plants, as the machinery tends to deteriorate over time. Also, metro areas like Seattle and Portland have spent billions of dollars to control the problem of combined sewer overflows CSO's. Despite the heavy public and private investments made, there is a wide scope for the environmental consultancy firms in this area.

Brazil has been facing problems regarding waste water management due to inefficient and medieval approach towards sewage treatment. Only 40% of the sewage generated is treated by approximately 2800 sewage treatment plants. According to government figures, Mexico's waste water treatment coverage was 53.3% in 2014 and the government plans to increase the coverage to 63% by 2018.

State agencies and tribes in the US are implementing Wetland Program Plans WPPs to protect and restore wetlands. Wetlands are areas where water covers the soil most of the time and improve water quality, store water and provide habitats for fish and wildlife. The EPA provides technical assistance, financial support and organizes development activities to protect wetlands. Major industries utilizing and demanding environmental consulting services in the Americas are oil and gas, manufacturing industries, transportation and automobile.